Holmes and Watson travel to London to help track down an old mentor and investigate an unsolved mystery. Meanwhile, Mycroft Holmes, Sherlock's estranged brother, reunites with Sherlock and reveals some secrets of his own.
Elenco:
Jonny Lee Miller
,
Lucy Liu
,
Jon Michael Hill
,
Aidan Quinn
,
John Noble
,
Natalie Dormer
,
Ophelia Lovibond
,
Rhys Ifans
,
Sean Pertwee
.
